Suggestions for CW mode:

1) Current CW mode is CW-U only. However, LSB (CW-L) is the most commonly used CW mode used by other manufacturers such that received CW pitch increases with an increase in displayed frequency.

2) In consideration of #1 above, allow right-click on the CW mode button to toggle between CW-L and CW-U to allow the user better interference management of strong nearby CW signals. All recent transceivers from other manufacturers have this feature.

Paul, W9AC

W9AC пишет:
Use the Github suggestion option Paul -https://github.com/ExpertSDR3/ExpertSDR3-SUGGESTIONS

and even then, Good LUCK!

you get your stuff fixed down there; it was a hard copy on you the other morning 3630- Yes you know who this is.

Hello Paul.
1. CW-L is not commonly used CW tone, we have lots of customers who actually thanked us for making CW as it is right now. So, let's not generalize something based on personal opinion.

2. CW-L or CW-U influences audio tone changing, reversed, or not when you change the tuning frequency.
CW-U was a logical choice, in our opinion, when you raise frequency, tone lowers because you see that signal goes from right side to left side of the filter.
Also, when you use the DSE feature, when the signal is on the filter's left side, you can hear a panoramic effect.

3. As Rick advised, please add your suggestion on GitHub, this way it won't be lost.
You are correct, it would be nice to have this feature as an option.

CW signals are not “transmitted on the upper sideband”, nor the lower one. A CW signal is approximately at a single frequency (with only the additional bandwidth required to allow the key-up and key-down transitions).

However, the standard method of receiving a CW signal is identical in structure to a single-sideband receiver. The local oscillator (LO) of the receiver is set to a frequency not quite equal to the CW signal, and the difference between the incoming CW and the LO is the audio tone you hear. Let's say for concreteness that the difference is 800 Hz.

If that frequency shifting were all that was going on, then you would hear many CW signals (from both sidebands) at different pitches, so there is a very narrow filter to select just the one signal. That filter will select either the frequency +800 Hz from the LO (upper sideband) or the one −800 Hz from the LO (lower sideband).

For convenience, a modern transceiver does not display the LO frequency (as it does in single-sideband mode) but rather the LO frequency offset by 800 Hz, so that you know the actual frequency of the signal.

If you switch from upper-sideband reception to lower-sideband reception, then you (or your receiver's CPU, more likely) should simultaneously change the LO frequency to be 1600 Hz (double the offset) higher, so that (if you were perfectly tuned to start with) you'll hear the same signal at the same pitch as before.

The difference this makes is that signals not exactly at the 800 Hz offset frequency will be flipped around that midpoint: an unwanted signal within the filter passband that was at (relative) 1200 Hz will now be at 400 Hz, and you might find that lower-pitched sound less troublesome. Or, if your receiver's filters are not perfectly symmetrical for this purpose, the unwanted signal could be actually attenuated.